Weft-replenishing mechanism for double-shuttle looms



R'. G. TURNER Mar) 5, 1929.

WEFT REPLBNISHING MECHANISM FOR DOUBLE SHUTTLE LOOKS 2 Sheets-Sheet 1 i7V6/7/0f' R/chm G III/7767 Filed Jan. 5, 1926 Mar. 5, 1929. R. e. TURNER WEFT REPLENISHING MECHANISM FOR DOUBLE SHUTTLE LOOMS iled Jan. 5, 1926 2 Sheets-Sheet km N Q w am k f m. M f Q mm fi z B Patented Mar. 5,1929

UNIT-ED STATES 1,703,909 PATENT OFFICE.

GROMPTON & KNOWLES LOOM WORKS,

IORATION OF MASSACHUSETTS.

OE WORCESTER, MASSACHUSETTS, A 003- WEFTBEPLENISHING MECHANISM FOR DOUBLE-SHUTTLE L OOMS.

Application filed January 5, 1926. Serial No. 79,479.

This invention relates to improvements in bobbin changing double shuttle looms of the type used to weave double fabrics and it is the general object of the invention to provide a loom of this type with a magazine the bobbins of which move to transfer posit-ion by gravity.

In looms of the type specified the lay is pro- I magazines in which the bobbins are positively moved to transfer position but such a magazine entails the use of chains or other actuated means operative to move the bobbins after each transfer and they have usually been of the type which required that the bobbins move to transferposition in pairs so that if but one of a pair of bobbins is transferred the other untransferred bobbin of the pair mustmove out of position and a fresh pair moved into transfer position. It is an important object of my present invention to provide a magazine wherein the bobbins move to transfer position by gravity, the bobbins not necessarily moving in pairs but being able to adapt themselves to the conditions of transfer .so that if but one shuttle is replenished there will not necessarily he a corresponding movement on the part of the bobbin positioned for the other shuttle.

It is a further'object of my invention to ,make the distance between the axes of the shuttles a multiple of the diameter of the bobbin so that when the latter fall to position they will be properly placed for transthe end that'the bobbins next above the armsv I may not be positioned to prevent withdrawal ofthe transferrer arms.

With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arr'angement of .parts her'einafter described and In the accompanying drawings wherein one convenient embodiment of my invention is shown,

Fig. 1 is a front elevation of a portion of a double shuttle loom having my invention applied thereto,

Fig. 2 is a vertical section on line 2-2 of Fig. 1 on an enlarged scale,

Fig. 3 is a'horizontal section on line 33 of Fig. 2,

Figs. 4 and 5 are views similar to Fig. 2 but showing the transferrer arms in different positions, i

Fig. 6 is a vertical section on line 6-6 of Fig. 2 on an enlarged scale,

Fig. 7 is a vertical section on line 77 of Fig. 3,

Fig. 8 is an enlarged horizontal section on line 8-8 of Fig. 1, and

Fig. 9 is a vertical enlarged section on line 99 of Fig. 1.

Referring to thedrawings it will be seen that I have provided a loom frame 10 in which is mounted for reciprocating move- .ment a lay 11 having located at the right hand with upper and lower shuttle boxes 15 and 16, v

respectively, the rear walls of which are slotted as at 17 forthe passage of exhausted bobbins. vided with a binder 18 slotted "to permit the passage of a full. bobbin and'said boxes receive shuttles S and S having bobbins B and B. Itis to .be understood that the shuttles move back and forth through the sheds of the loom as the lay reciprocates. i

' Located in front of the shuttle boxes 15 and 16 is a magazine M having-outer and inner vertical guides 20 and 21, respectively,

each slotted-to receive the tips and buttts, re-

spectively, of a stack of bobbins W as shown in Figs. 7 and 8'. The rear wall of guide 20 has formed therein upper and lower openings 22 and 23, respectively, each of which receives a yielding gate 24 which moves inwardly about a vertical pin 25 and is held normally in the position shown inFig. 3 by means of Each of said boxes 15 and 16 is protorsion spring 26. Between the openings 22 I the bobbins in transfer position I provide a transfer mechanism comprising a stud 32 ing the same purpose as the stop 27. The bobbins W have their tips and butts in the giiides 20 and 21, respectively, andit will be seen by referring to Figs. 3 and -5 that the lowestand second from the lowest bobbins are in such position that they can be moved horizontally against the yielding action of the gates 24 and 30.

In order to impart horizontal motion to fixed to the loom frame and having pivotally mounted thereon a pair of transfer levers 33 and 34 which cooperate with the upper and lower shuttles, respectively. Said transferrer levers are provided with cup shaped bobbin engaging heads which are of substantial length as shown in Fig. 3 and extend parallel to the bobbins. In Figs. 3

and 4 itwill also be seen that the transferrer" levers are provided with forwardly extend-' ing fingers 35 which extend forwardly far enough to support the bobbins thereover when the transferrer arms are in their rearmost position. 1 V

As seen in Fig. 2 said transferrer levers 33 and 34 are provided with depending legs 36 and 37, respectively, of unequal length. Pivotally mounted at the bottom of the legs 36 and 37 are transferrer latches 38 and 39, respectively, which are positioned for engagement with hunters 40- and 41, respectively, mounted on and moving with the lay 11..

Extending downwardly from' the under side of the magazine frame is a bracket 42 in which are slidably mountedcam blocks 43 and 44, respectively, controlled as to longitudinal position by means'of rods 45 and 46,

i in the position shown in Fig. 5.

respectively Said rods extend to the oppositeside of the loom and may be controlled by weft detectors in the manner set forth in the aforesaid patent. Each of said blocks is provided with a cam face 47 which is formed as one wall of a notch formed'in the under side of-theblocks. Each transferrer latch is provided with a forwardly extending tail 48 which normally'occupies a notch in'one of the blocks. As shown in Fig. 6 the transferrer levers have hubs 49 around which lie coil springs 50 connected to the levers and the bracket 42 to hold the said levers Under normal conditions the bobbins and the transferrer levers are inthe position inyieldingly dicated in Fig. 5 and the lay will move forwardly to the position indicated in said figure until a change of weft is necessary, at which time one or the other of the aforesaid rods will be moved. In Figs. 1 and 6 it is assumed that the rod 45 has been moved to the right so that the corresponding block 43 is also moved to the right causing a depression of tail 48 of the latch 38 because of the action of cam 47 on block 43.- The latch 38 is thus raised into the position shown in Fi 2 and as the lay advances the hunter 40 wi l engage said latch 38 and swing the transferrer lever 33 i'earwardly was shown in Fig; 2. This action on the part of lever 33 causes the second from the bottom bobbin to move against the gates 24 and 30 into the shuttle S at the same time expelling bobbin B which has become exhausted and which gave the indication for transfer. As. the lever 33 moves rearwardly the third from the'bot-tom bobbin will rest on the fingers 35 thus supporting all bobbins above said lever 33 to prevent the same from falling or,assuming a tilted position in the magazine. As the lay moves, backwardly the lever 33 will be returned by its spring 50.

In Fig. 4 it is assumed that two transfers are occurring simultaneously in which 'instance both the blocks 43 and 44 will be moved to the right and both the latches 38 and 39 will be raised so that the transferrer levers will both be given .a transferring movement to the rear. It will be seen that the next to the bottom bobbin lies between the transferrer levers and as lever 34 moves forwardly said bobbin will fall to the lowest position and upon the next operation of lever 34 will be moved into the shuttle S.

The blocks 43 and 44 are returned to nor-' mal position after engagement of the bobbins with the latches by mechanism not set forth herein but well understood and contemplated in the aforesaid patent.

It will be seen by referring to Figs. 2, 4, and 5 that the distance between the axes of the shuttles is twice the diameter of the bobbin and that the bobbin above the bottom bobbin isopposite the stops 27 and 31 so that even thoughthe bobbins on both sides thereof are being transferred as indicated in Fig. 4 said bobbin will not be moved towardthe shuttles.

From the for going it will be seen that I have provideda agazine for a double shut-' tle loom wherein the bobbins are moved by gravity to proper position for transfer and that their diameter is such with respect to the distance between the axes of the shuttles that the bottom and second from the bottom bob-- held against improper angular position in the magazinesby the fingers extending forwardly from the heads of the transferrer levers. It will also be seen that the next-to the bottom bobbin is restrained positively against horizontal motion when the bobbins on either side thereof are being transferred; I

Having thus described my invention it will be apparent that changes and modifications may be made therein withoutdeparting from the spirit and scope of-the invention, and l do not wish to be limitcd'to the details herein disclosed, but what I claim is:

1. lln a weft replenishing loom havingtwo shuttle boxes in vertical alignment to receive shuttles having slots extending horizontally therethrough, a magazine to receive a stack of bobbins which are moved by gravity to a plurality of transfer positions, the upper bobbin in transfer position being supported by the lower bobbin which is in transferposition, the distance between the centers of the shuttles when in transfer position being a multiple of the diameter of the bobbinsin the magazine, each bobbin moving in a substantially horizontal direction from the nfagazine into the respective shuttle.

2. lln a weft replenishing loom having two shuttle boxes in vertical'ali nment to receive shuttles having slots exten ing horizontally therethrough, a magazine to receive a stack of bobbins which are moved by gravity to a plurality of transfer positions which are equidistant from the shuttles at the time of transfer, the two bobbins in transfer position being separated by a third, bobbin, said third bobbin and the upper bobbin deriving their support from the bottom bobbin, said third bobbin remaining untransferred when the bottom bobbin and the bobbin above said third bobbin aretransferred.

3. In a weft replenishing loom having two shuttle boxes in vertical alignment to receive shuttles having slots extending substantially horizontally therethrough, a magazine to receive a stack of bobbins which are moved by gravity to a plurality of transfer positions which are equidistant from the shuttle boxes when the latter are in a position for transferring, the two bobbins in transferposition being separated by a third bobbin and the upper bobbin in transfer position being supported by the third bobbin, said third bobbin remaining untransferred when either the lower or the upper bobbin in transfer position is transferred into a corresponding shuttle.

4. In a weft replenishing loom having two shuttle boxes in vertical alignment to receive shuttles having slots extending substantially horizontally therethrough, amagazine to re ceive a stack of b bbins which are moved by gravity to a plurality of transfer positions which are equidistant from the shuttle boxes when the latter are in a position for transferring, the two bobbins in transfer pbsition being separated by a third bobbin and the upper bobbin'in transfer position being supwhich are equidistant from the shuttle boxes when the latter are in a position for transferring, all the bobbins of the magazine above the lowest deriving their support from the lowest bob-bin, the distance between the centers of the shuttles when in transfer position being a multiple of the distance betweenthe centers of adjacent bobbins in the anagazines, the second bobbin above the bottom bobbin'being in transfer position and being held in said position by the bobbin immediately above the lowest bobbin, the bobbins when being transferred moving in substantially horizontal directions.

6. In a weft replenishing loom having" two shuttle boxes in vertical alignment to receive shuttles having slots extending substantially horizontally therethrough, a magazine to receive a stack of bobbins which are moved by gravity to a plurality of transfer positions which are equidistant from the shuttle boxes when the latter are in a position for transferring, said magazine to hold three bobbins in vertical alignment, the upper and lower of which are in transfer position and the intermediate bobbin of which rests on the lewest bobbin and in turn supports the upper bobbin,.and means to transfer the upper and lower bobbins in a substantially horizontal direction into the corresponding shuttles .while the intermediate bobbinremains untransferred.

7. In a weft replenishing loom having two shuttle boxes in vertical alignment to receive shuttles having slots extending horizontally therethrough, a magazine to receive a stack of bobbins which are moved by gravity to a plurality of transfer positions which are equidistant from the shuttles'at the time of Y transfer, the two bobbins in transfer position being separated by a third bobbin, said third bobbin and the upper bobbin-deriving their support from the bottom bobbin, said third bobbin remaining untransferred when the bottom bobbin and the bobbin above said third bobbin are transferred, the distance between the shuttles when in transfer position being a multiple of the distance between adjacent bobbins in the magazine and said bobbins being movable in a substantially horizontal direction whenbeing transferred from the magazine into the corresponding shuttles.

8. In a weft replenishing loom having two aligned shuttle boxes to receive shuttles, a magazine to receive a series of aligned bobbins which move by gravity and in Contact with each other to a position substantially parallel to the shuttles when the latter are in transferring position, the distance between the centers of the shuttles when in transfer position being a multiple of the diameter of the bobbins in the magazine, each bobbin when moving into the corresponding 'shut tle moving in a direction which is substantially perpendicular to the line joining the cen ters of the shuttles.

9. In a weft replenishing loom having two shuttle boxes in vertical alignment to receive shuttles having slots extending horizontally theret-hrough, a magazine to guide bobbins which are movedby gravity in contact with each other toi a plurality of transfer positions so that the bobbins in transfer position shall be at the same distance from wea e-0e their corresponding shuttles, and means to transfer a bobbin from either transfer posiby the lower bobbin which is in transfer position, the bobbins when in the transfer positions being spaced apart a distance equal to the distance between the shuttles when the latter are boxed, each bobbin moving in a substantially horizontal direction from the a magazine into the respective shuttle.

lln testimony whereof I have hereunto affixed my signature.

RICHARD GREENLEAF TURNER. 

